<!-- css属性顺序
    1.浮动/display
    2.盒子模型：margin、padding、border、width、height、bgc
    3.文字样式：text-align、line-height、font-size、font-family
    目的
    1.方便自己阅读
    2.方便浏览器解析
    3.方便浏览器渲染
    4.方便他人阅读
    5.方便他人修改

-->

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .top{
            width: 1226px;
            height: 100px;
            background-color: #ffc0cb;
            margin: 0 auto;
        }
        .box{
            width: 1226px;
            height: 460px;
            background-color: green;
            margin: 0 auto;
        }
        .left{
            width: 234px;
            height: 460px;
            background-color: #ffa500;
            float: left;
        }
        .right{
            width: 992px;
            height: 460px;
            background-color: #87ceeb;
            float: right;
        }

    </style>
</head>
<body>
    <div class="top"></div>
    <div class="box">
        <div class="left"></div>
        <div class="right"></div>
    </div>
</body>
</html>